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greater sciatic foramen
lesser sciatic foramen
sacrospinous lig.
sacrotuberous lig.
greater sciatic foramen – connects pelvic cavity to gluteal regionlesser sciatic foramen – connects gluteal region to perineum
relationship of the sciatic n. to the piriformis m.
both divisionspassing inferior to:
87%
common peroneal divisionpassing through:
12.2%
common peroneal divisionpassing superior to:
0.5%
(Grant’s atlas – study of 640 limbs)